The influence of the stem-cement interface in total hip replacement—a comparison of experimental and finite element approaches

Abstract Experimental and finite element investigations were carried out on axisymmetric models of the femoral component of a total hip replacement. In one instance, the interface between the stem and the surrounding bone cement was assumed to be rigidly bonded; in a second, it was allowed to slip....

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Bibliographic Details
Published in:Proceedings of the Institution of Mechanical Engineers. Part H, Journal of engineering in medicine Journal of engineering in medicine, 1997-01, Vol.211 (2), p.181-186
Main Authors: Wheeler, J P G, Miles, A W, Clift, S E
Format: Article
Language:English
Subjects:
Biological and medical sciences
Biomechanical Phenomena
Bone Cements
Evaluation Studies as Topic
Hip Prosthesis - instrumentation
Humans
Medical sciences
Orthopedic surgery
Poisson Distribution
Prosthesis Design
Stress, Mechanical
Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases
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Summary:Abstract Experimental and finite element investigations were carried out on axisymmetric models of the femoral component of a total hip replacement. In one instance, the interface between the stem and the surrounding bone cement was assumed to be rigidly bonded; in a second, it was allowed to slip. For the latter case, a friction coefficient of 0.2 was determined experimentally. The predictions of the finite element models demonstrated excellent agreement with the results from the experimental tests at all sites where comparisons were made, thus validating these models. The effect of stemcement slip was shown to reduce the maximum shear stress in the cement mantle by approximately 30 per cent.
ISSN:0954-4119
2041-3033
DOI:10.1243/0954411971534296